Posted: Sun Feb 11, 2018 9:24 pm
The question is: "Calculate the heat released by 5.025 g of Kr(g) at 0.400 atm as it cools from 97.6 C to 25.0 C at (a) constant pressure and (b) constant volume. Assume that krypton behaves as an ideal gas." The answer for constant pressure is -90.6 J and the answer for constant volume is -54.4 J. Why is more heat released at constant pressure than at constant volume? I thought some of the heat released at constant pressure is needed to do work.